Backend development (Java, .NET, JavaScript) jobs

Full Stack Engineer - Low-Code Development (Public Sector)

Xtremax Pte. Ltd. · Posted Nov 9, 2026

Open

Singapore, Singapore, Singapore
3+ years

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Full Stack Engineer - Low-Code Development (Public Sector)

Xtremax Pte. Ltd. · Posted Nov 9, 2026

Open

Singapore, Singapore, Singapore
3+ years

Apply with RefersoAI Apply on careers page

Backend Engineer - Streaming Architecture Group, Entertainment Service Development Department (ESDD)

Rakuten · Posted Nov 9, 2026

Open

Tokyo, Tokyo, Japan
5+ years

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Backend engineer responsible for development, operation, and maintenance of video platforms across Rakuten, including backend development, performance tuning, AI integration, and containerized deployment.

Responsibilities

Backend development using PHP/Java
Programming, testing, and performance tuning
Utilizing AI to reduce man-hours and improve quality
Operation and maintenance of the video distribution platform
Development and operation in container environments using Docker/Kubernetes

Requirements

Nice to have: Streaming platforms
Nice to have: Japanese business level proficiency

Skills

Backend development PHP Java Laravel Spring Boot Docker Kubernetes RESTful APIs SQL

Senior Software Engineer – Agentic AI (M/F/D)

bettermarks GmbH · Posted Nov 9, 2026

Open

Berlin, Berlin, Germany
Hybrid
Full-time · Senior

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Build agentic workflows and shared tools to support content and engineering teams, focusing on agentic AI for learning content delivery.

Responsibilities

Build agentic content workflows: Develop solutions that support the preparation, generation, and organization of learning content
Support content workflow management: Improve how content moves through creation, review, publication, and updates
Enable scalable content delivery: Build and improve services and processes for content availability
Create shared AI tooling: Give teams tools and integrations for agents
Develop agentic delivery pipelines: connect agentic coding to CI/CD workflows

Requirements

Nice to have: Machine learning
Nice to have: Advanced frontend development
Nice to have: Messaging systems
Nice to have: Knowledge graphs

Skills

Agentic coding AI agents System architecture Backend development Database expertise

Machine Learning Senior Advisor

Cigna Healthcare · Posted Nov 9, 2026

Open

Hyderabad, Telangana, India
Senior
12–16 years

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Senior software engineer focused on AI-enabled backend services and LLM integration for enterprise systems.

Responsibilities

Design and build backend services for AI-enabled applications
Integrate Large Language Models (LLMs) into enterprise systems
Implement structured outputs, tool/function calling, and safe interaction patterns
Develop and maintain APIs and service integrations
Ensure systems are secure, observable, and production-ready

Requirements

Nice to have: LLM-based application patterns
Nice to have: prompt engineering
Nice to have: responsible AI usage
Nice to have: AI orchestration
Nice to have: agent-based patterns

Skills

Python LLM integration AWS API design distributed systems authentication and authorization secure system design

Senior Software Engineer - Fullstack Java, React.Js,etc.

UnitedHealth Group · Posted Nov 10, 2026

Open

Senior

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Senior Software Engineer focused on fullstack development using Java and React.js, responsible for building, maintaining, and optimizing web applications and collaborating across teams to deliver high-quality software.

Responsibilities

Developing and maintaining web applications using ReactJS and other relevant technologies
Collaborating with cross-functional teams to define, design, and ship new features
Writing reusable, efficient, and scalable code
Implementing responsive and mobile-friendly user interfaces
Optimizing applications for maximum performance and scalability

Skills

Java React.js frontend development backend development Agile Git responsive design mobile-friendly interfaces automated testing code reviews ReactJS

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Software Engineer, Distributed Compute

Base Power Company · Posted Nov 8, 2026

Open

Austin, Texas, United States
On-site
Mid
3+ years

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Build and maintain application software that runs on distributed battery devices, ensuring reliability, security, and performance in edge environments.

Responsibilities

Design and implement core device software with >99.5% uptime
Build robust device-to-cloud communication protocols handling network interruptions
Create safe, rapid deployment infrastructure and tooling for OTA updates
Develop telemetry systems for diagnostics without bandwidth-heavy data
Work within hardware constraints to maximize functionality

Requirements

Nice to have: real-time systems
Nice to have: safety-critical systems
Nice to have: automotive
Nice to have: robotics
Nice to have: industrial IoT

Skills

C C++Rust Go systems programming networking HTTP/REST APIs

Senior Backend Engineer

Transmit Security · Posted Nov 1, 2026

Open

Tel Aviv-Yafo, Israel
Hybrid
Senior
5+ years

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Build and evolve a mission‑critical backend system for a platform that fuses customer identity and anti‑fraud solutions.

Responsibilities

Build new features such as login flows, passkeys, device binding, policies and APIs
Write backend code daily in Scala with Akka, MongoDB, Postgres, Redis and Kafka
Maintain codebase health by upgrading, fixing vulnerabilities, adding tests and refactoring
Investigate and resolve production issues for customers
Mentor teammates through code reviews and conversations

Requirements

B.Sc. in Computer Science or Engineering
Nice to have: OAuth
Nice to have: OIDC
Nice to have: SAML
Nice to have: FIDO

Skills

Scala Akka MongoDB Postgres Redis Kafka Java C#

Manager, Forward Deployed Engineering - Munich

OpenAI · Posted Nov 9, 2026

Open

Munich, Bavaria, Germany
Hybrid
Full-time · Manager
8+ years

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Lead and grow a Forward Deployed Engineering team in Munich, managing high‑stakes customer deployments and driving technical and business outcomes.

Responsibilities

Lead and grow a team of FDE delivering production systems with frontier models
Own end‑to‑end delivery outcomes through clarity, speed, tight coordination, and technical quality
Codify what works into tools, playbooks, and roadmap inputs that create leverage for both OpenAI and its wider developer community
Notice early indicators and raise them with urgency, whether in product behavior, customer environments, or delivery practices
Use judgement to distinguish what requires action and what does not

Skills

Javascript Python engineering technical delivery high‑pressure project management frontend development backend development frontend

Engineering Manager (Java/Kotlin Stack)

Plata Card · Posted Sep 16, 2025

Open

Hybrid
Manager
3+ years

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Lead a backend engineering team building high‑scale, distributed systems for financial products.

Responsibilities

Lead, mentor and grow a team of engineers
Own team delivery and service reliability
Drive technical strategy and architecture
Partner with product and engineering stakeholders
Improve engineering practices

Requirements

Nice to have: Golang
Nice to have: fintech
Nice to have: banking
Nice to have: payment systems
Nice to have: third‑party API integrations

Skills

Java Kotlin Kubernetes AWS microservices messaging data storage backend development JVM

Senior Developer (Contentful)

Valtech · Posted Nov 6, 2026

Open

Remote, North Macedonia
Remote
Full-time · Senior
competitive salary

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We are looking for an experienced, hands-on Senior Developer to support the migration of an enterprise digital platform from Sitecore to Contentful. The role involves both content migration and the migration of existing applications, React/TypeScript.

Responsibilities

Support the migration of an enterprise digital platform from Sitecore to Contentful
Perform content migration and migration of existing applications
Develop and enhance frontend applications using React and TypeScript
Replace Sitecore-specific dependencies and integrations with Contentful-compatible solutions
Develop content migration tooling, scripts, and automated processes

Requirements

Nice to have: Next.js
Nice to have: Sitecore JSS
Nice to have: CMS/DXP
Nice to have: Multilingual
Nice to have: Multisite

Skills

React TypeScript Contentful Sitecore APIs Headless CMS Backend development

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